JDOM读取XML文件

先附上一个实体对象包含了 姓名 角色  年龄

package com.gyj.jdom;

import java.io.Serializable;

/**
 * 一个实体对象并且序列化
 * @author GYJ
 * @date 2014-3-22
 */
public class EmployeeObject implements Serializable{
	private static final long serialVersionUID = -5538384024205531388L;
	
	private String name;
	private String role;
	private int age;
	/**
	 * @return the name
	 */
	public String getName() {
		return name;
	}
	/**
	 * @param name the name to set
	 */
	public void setName(String name) {
		this.name = name;
	}
	/**
	 * @return the role
	 */
	public String getRole() {
		return role;
	}
	/**
	 * @param role the role to set
	 */
	public void setRole(String role) {
		this.role = role;
	}
	/**
	 * @return the age
	 */
	public int getAge() {
		return age;
	}
	/**
	 * @param age the age to set
	 */
	public void setAge(int age) {
		this.age = age;
	}
	
	/* (non-Javadoc)
	 * @see java.lang.Object#toString()
	 */
	@Override
	public String toString() {
		return "EmployeeObject [name=" + name + ", role=" + role + ", age="
				+ age + "]";
	}
}

利用JDOM来解析读取一份相对应的XML文件

package com.gyj.jdom;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.jdom2.Document;
import org.jdom2.Element;
import org.jdom2.input.DOMBuilder;
import org.xml.sax.SAXException;

/**
 * 利用JDOM读取XML文件
 * @author GYJ
 * @date 2014-3-23
 */
public class JDOMXMLReader {

	/**
	 * 得到JDOM的文档对象还有其他的方式列如：sax stax解析器都可以得到, 这里这介绍一种的使用就行了，也是性能比较好的JDOM
	 * <p>需要下载JAR包jdom-2.0.5.jar URL：http://www.jdom.org/dist/binary/
	 * @param args
	 */
	public static void main(String[] args) {
		//这是一份xml文件
		String fileName = "employees.xml";
		//定义JDOM文档对象
		try {
			Document jdomDoc = useDOMParser(fileName);
			//得到根节点
			Element root = jdomDoc.getRootElement();
			List<Element> listElements = root.getChildren("Employee");
			List<EmployeeObject> list = new ArrayList<>();
			for (Element empElement : listElements) {
				EmployeeObject eobj = new EmployeeObject();
				eobj.setAge(Integer.valueOf(empElement.getChildText("age")));
				eobj.setName(empElement.getChildText("name"));
				eobj.setRole(empElement.getChildText("role"));
				list.add(eobj);
			}
			//输出结果
			for (EmployeeObject empObj : list) {
				System.out.println(empObj);
			}
		} catch (ParserConfigurationException e) {
			e.printStackTrace();
		} catch (SAXException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		
		//out put=============
		/*EmployeeObject [name=gyj, role=Java, age=29]
		EmployeeObject [name=Lisa, role=CEO, age=35]
		EmployeeObject [name=Tom, role=Manager, age=40]*/
		
	}
	
	/**
	 * 使用DOM解析器得到文档对象
	 * @param fileName
	 * @return
	 * @throws ParserConfigurationException 
	 * @throws IOException 
	 * @throws SAXException 
	 */
	private static Document useDOMParser(String fileName) throws ParserConfigurationException, SAXException, IOException {
		//创建文档对象
		DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
		DocumentBuilder dBuilder;
		dBuilder = dbFactory.newDocumentBuilder();
		org.w3c.dom.Document doc = dBuilder.parse(new File(fileName));
		//DOMBuilder 是JDOM的文档类
		DOMBuilder domBuilder = new DOMBuilder();
		//返回JDOM文档对象
		return domBuilder.build(doc);
	}
}

employees.xml 文件内容如下

<?xml version="1.0" encoding="UTF-8"?>
<Employees>
    <Employee id="1">
        <age>29</age>
        <name>gyj</name>
        <role>Java</role>
    </Employee>
    <Employee id="2">
        <age>35</age>
        <name>Lisa</name>
        <role>CEO</role>
    </Employee>
    <Employee id="3">
        <age>40</age>
        <name>Tom</name>
        <role>Manager</role>
    </Employee>
</Employees>